1. Where do i get a driver for wifi of ASUS eee PC?
It all depends on what driver ( they are called kernel loadable modules in linux ) you need. To find out, open a konsole, run the command 'sudo lspci' ( without the quotes ), look for the lines for your wifi card. Cut and paste those lines here. That will tell us what hardware you have. Then we go looking for the driver. ( KLM ). It may be part of your system now. If it is, a modprobe command will load it. Then you have to configure the interface.
If you still have windows installed, then you can also look in the device manager for the card you have.